Kubernetes bash functions

k8.bash

# bash kubernetes functions
# kubectl with kubeconfig
function k () {
    kubectl --kubeconfig=kubeconfig "$@"
}

# exec shell in pod
function k8sh () {
    local p="$1"
    shift
    k exec -it "$p" -- env COLUMNS=$(tput cols) LINES=$(tput lines) TERM=$TERM /bin/sh "$@"
}

# list pods
function kp () {
    k get -o wide pods "$@"
}

# list services
function ks () {
    k get -o wide svc "$@"
}

# logs for pod
function kl () {
    local r="$1" p
    [[ $PAGER ]] || PAGER=more
    # match full pod name, pod in replica, or pod in deployment
    for p in $(k get pods | awk "\$1 == \"$r\" || \$1 ~ /^$r-[a-z0-9]{5}$/ || \$1 ~ /^$r-[0-9]{1,10}-[a-z0-9]{5}$/ { print \$1 }"); do
        echo "===> $p <==="
        k logs "$p" | $PAGER
    done
}

# ssh into each host
function kssh () {
    local conf="ssh_config"
    local h
    for h in $(awk '/^Host / { print $2 }' "$conf"); do
        echo "$h"
        ssh -F "$conf" "$h" "$@"
    done
}

# run command in each k8 cluster
function vk () {
    local d
    for d in *; do
        if [[ -f $d/kubeconfig ]]; then
            echo "======> $d <======"
            (cd "$d" && "$@")
        fi
    done
}

# tail follow logs for pod
function vtf () {
    local r="$1" d p
    local -a js
    for d in *; do
        if [[ -f $d/kubeconfig ]]; then
            cd "$d"
            for p in $(k get pods | awk "\$1 == \"$r\" || \$1 ~ /^$r-[a-z0-9]{5}$/ || \$1 ~ /^$r-[0-9]{1,10}-[a-z0-9]{5}$/ { print \$1 }"); do
                kubectl --kubeconfig=kubeconfig logs -f "$p" &
                js+=("$!")
            done
            cd ..
        fi
    done
    trap 'kill ${js[@]}' INT EXIT
    wait "${js[@]}"
}